The muscular system is made up of
Answer: All the muscles
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The secretion of which hormone decreases when calcium blood levels increase?
a. calcitonin b. parathyroid hormone c. thyroid hormone d. epinephrine e. norepinephrine
Why can measles virus and poxvirus infect many human tissues and influenza virus can infect only one type of tissue? What will be an ideal response?
Which of the following atoms would most likely be involved in an ionic bond?
a. hydrogen b. oxygen c. sodium d. hydrogen and oxygen. e. hydrogen and sodium.
In the blood clotting process, platelets arrive at the site of damage and start secreting substances to attract more platelets. More platelets arrive at the site and secrete attractants to recruit more platelets. This is an example of:
A. positive feedback. B. negative feedback. C. electrical signaling. D. feedforward regulation.